Recent content by cheers731

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    Help, T/T pump leaks worse after repairing

    Hi Folks, The mortor is 86 Mercury 115hp 2 stroke. The center (main) hydraulic piston developed a small leak of fluid, so my buddy and I took the piston out, ordered a rebuild kit for O-ring replacement. We found the O-ring around the scraper at end cap has a few cracks and try to replace it...
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    Trim/tilt pump fluid

    Hi Folks, The outdrive is 1986, Mercury 115hp 2 stroke in line 6 cylinders. I am ready to put the trim/tilt pump back together and read the Seloc repair manual saying to use transmission fluid. I remembered read on internet, people say not to use transmission fluid because it contains too much...
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    1986 Mercury 115 hp outboard troubleshooting.

    Hi Folks, Help needed for trouble shooting on 2 issues after taking the boat for a full ride. 1st, after 2 hrs ride, the trim pump start failing. No trim up and trim down sounds weak. After switching around the wire at the relay/solenoid, the trimp up will work and trim down failed. Trim up...
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    Tuna fishing in NJ

    Hi folks, I am thinking to go tuna fishing on a party boat off NJ in Sept but a little worry about come back empty handed. I have never done this before and it will cost $400 or more for a one and a half day trip. Anyone has done this before? I appreciate any tips and advice before I make my...
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    1986 Mercury 115 hp decarbonize

    Hi folks, Just bought a boat with a 1986 Mercury 115 hp 6 cylinder outboard. I used to deal with I/O setup and this is my 1st outboard and need help to build a quick learning curve. The engine is running strong but with lots of blue smoke. I plan to do decarbonize using Seafoam but not sure...
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    Help needed on 92 OMC 5.8L distributor installation

    Hi Folks, Just finished putting the rebuilt heads back on and ready to install the distributor. Distributor shaft was removed and cylinder was cranked/turned for compression test without distributor in. My knowledge is limited to find the #1 TDC so need help on how to confirm my distributor is...
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    Burnt Valves, what caused it?

    Hi All, 1992 Four Winns, OMC 5.8L Cobra outdrive. I posted a while ago about low compression on cylinder 3 and 7. After removal of heads, the valves on cylinder 3 and 7 are badly burnt, almost have no beveled edge and one has edge chipped a little. The machine shop will go replace them and do a...
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    5.8L engine model number location

    Could anyone kindly tell me where is the engine model number located on 92 OMC 5.8L engine? Thanks,
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    92 OMC 5.8L low compression on cylinder #3 and #7

    Just learned from the shop that my 92 OMC 5.8L has low compression on cylinder #3-100 psi and #7-30 psi. I can't figure it out how it happened and what to do next? Can anyone shed some light on how to troubleshooting on bent valves, leaking gaskets, piston rings or something else for repairing...
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    OMC 5.8L need a replacement engine

    Hi All, My 92 OMC 5.8L was shut. Does anyone know how much it will cost for a rebuild one? The boat is 92 Four Winn 205 Sundowner. Will appreciate if you can recommend a reliable shop. Thanks, Frank
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    92 OMC Cobra 5.8L low rpm after 20 min cruising

    Hi folks, Need some help troubleshooting on this repeating problem. It's a 92 OMC Cobra 5.8L engine, easy start up on cold engine and runs well at WOT after warm up and cruising over around 15-20 min. Then the rpm will fall gradually to 1500 and if I push more gas, it will stall. Then it gets...
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    Which 2 terminals for jumping start?

    My 92 Four Winns with 5.8L OMC and Corbra OD has developed intermittent starting problem. On the cold start, it requires extra gas to start. However, with the warm-up button depressed, starter will not turn with either lever move forward or reverse. The starter will turn when lever is dead in...
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    Can't throttle up on neutral start

    Hi folks, My 92 Four Winns 205 Sundowner with 5.8L Cobra setup can not do a cold start without throttle up a little. Today, at launch ramp, I have a cold start and the starter will not crank at any position out of neutral. The starter will crank the engine when it's on neutral but will not crank...
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    Spark plug wire set for 92 5.8L Cobra

    I would appreciate it if anyone can tell me what's the part number for spark plug wireset on 92 OMC 5.8L? I looked through the internet can only found those wire set listed for 88-90 but nothing on 92. Are they interchangeble? Thanks, Frank
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    Any tricks to get compression tester tube in?

    I was doing compression test on my 92 Four Winns OMC 5.8L Cobra yesterday. I removed all 4 plugs on starboard side but have no success to put tester tube in any one of the cylinders. The test tube is a 14" rubber with thread for cylinder side. Because the angle and tight space from exhaust...
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